Burner



Jung- 17, 1930. cfiw HUNTER 1,765,274

BURNER Filed May 24, 1927 2 Sheets-Sheet 1 Patented June 1 7, 1930 CAMPBELL'M. HUNTER; OF LONDON, ENGLAND rianna Application filed may 24, 1927. Serial no, 193,889.

1 My invention relates to atmospheric gas andoil burners of relatively large capacity designed primarily for use for industrial purposes. y

" The principal object of invention is to provide means for burning a combustible mixture composed either of oil, steam and air; or gas steam and air or oil,*g'as, steam and air so asto nieet'any particular require- 19 mentor condition, Another object of my invention is to mount the oil jet in a manner permitting its ready removal forpurposes of cleaning and replacement. Another object of the invention isto' provide simple and eflicient means whereby either air or gas, or both, may besejected: into the mixing chamber of the burner by a fluid under pressure. V v g f g A primary'feature of the invention con- 29 sists of a burner having a mixing chamber, a plurality of adjacent compartments, one

of the compartments having communication with an oil supply and the otherhaving communication with a fluid supply under pressure, each. of the compartments having a jet'for conveying their respective-fluids to the mixing chamber, and'the oil jet being removably mounted. W

Another feature of the invention'consists of a burner having a mixing chamber and gas and airports, the axes of said ports being, spaced from and extending 1 atf'an angle to the longitudinaljaxis of the mixing chamber, and a common'discharge 1 opening leading into said mixing chamber from the said ports. j i i i j" i I In the drawings illustrating ajpreferred embodiment of my invention',-i

Figure llis'a plan view of the burner and a suit ble arrangement of the pipe connectionsand valves, I I V Figu're2 is a planyiew'of the burner, partly elevation andpartly ini section.

Figure 3 is a sectional line 3+3, Fig. 2.

.the'burner, l j 1 s Figure 5is a sectional'view' taken onfthe line'5v5, Fig.3. i In the drawings the burner is shown as Figure 4' is a rear endelevational view of 1 formed With a chamber 2 into which the various fluids comprising the combustible mixture are adapted to flow and wherein they are intimately and effectively mixed before being discharged therefrom. For inducing increased velocity of floW- of the mixture from the chamberthe latter is formed with a constricted exit throat} merging into a somewhatlarger discharge nozzleh I 7 j iii 6 Above themixing chamber and on oppo site'sides thereof, the burner vhas a gas port 5 and an air port- 6. These ports may advantageously be tangentially arranged with respect to the mixing chamber, and their axes are preferably coincident with each v other and substantially normal to the longitudinal axis of "the burner. 'Adjustably mountedin the port 6 for controlling the admission of air is ascrevv threaded valve member 7 having apertures 8 the effective size of Whichmay be varied by rotating it in I the desired direction. Secured to a portion of the valve 7, preferably by means of a i'ivet'9, is a spring finger l0 hich may,,- if desired, beemployedfor frictionally engaging with 'the' vall' of the port fo'r main ta'ining'thevalve in' a given position of adjustment: p .f The' gas port 5 c'onnects' vith a gas supply pipe 11 having a valve 12' for regulating the quantity of gas to bej deliveredito the burner". This port has communication With the air port 6, and they both have communication Withfan' opening' l3 formed in the 3% top Wall of the mixlng chai'nber sothat-the gas andair may'e'nter the'mixing chamber at a'common point; To tl efrear lof the I mixing' chamber 2.and preferably in ax al a-l'in'ein ent' therewith 1s a 'detachably Con nected'heating {chamber "14. A' diagonally extending partition Wall lidivides this latg V ter chamber'into longitudinally disposed vievv take'n on the compartments 16" and 171. These'compa'rtments "are provided with 'portsQor 1 openings 95 18 and 19Wl'1l0l1 are preferably 'dlametrrcally [opposed"for-receiving respectively oil; a1icl steam fromthe supply pipes 20 and'QI 'each' of the pipes being providedfvvith control valves 22. The provision of the valve 22' in wardly into the latter and is provided with an opening 23 constituting a steam jet. The

opening is preferably lined with a rustless' annulus 24 cast in place, such annulus being advantageously madeot monel metal.

concentrically spaced within the steam et 28 and coextensive therewith is the oil jet 25 having communication with the oil compartment 16 by the radial openings 26. The oil jet extends through an aperture 27 in the partition wall 15 and is detachably mounted in the rear wall of the heating chamber in the opening 28. By this means the oil jet may be readily removed without disassembling the burner for the purpose of cleaning the steam and oil jets or for replacement of thelatter. The opening 28 is effectively sealed by a detachable screw threaded plug 29.

To create a reduced pressure at the the i charge end of the oil jet in order to cause the oil to flow into the mixing chamber b y induction, the annular space between the ets increases in cross sectional area in the direction of flow of the steam. This is preferably accomplished by tapering the outer periphery 3O ofthe discharge end of the oil jet. .By this means and by locating theends of the jets rearwardly of the center of the opening 13in tlie mixing chamber, gas and air are efiiciently ejected or induced into the said chamber. Since the jets are arranged substantially coaxial with the mixing chamber a thorough atomization of the oil and subsequent mixing with the other ingredients of the combustible mixture is obtained, 7 1 By the combination of these various features the burner has been found under actual test to have a burning capacity ranging from two to thirty-three barrels of oilfor twentyfour' hours, the quantity of oil consumed being primarily dependent upon the pressure at which the oil ejecting fluid'is maintained.

Inorderto obviate any danger from, backfiring a gauze damper 31 may be inserted in the gas inletpipe in any suitable manner.

It'will be appreciated that, due to the relative locations of the steam and oil compartments,- the oil is effectively heated before being-introduced into the mixing chain ber.

into.tlie mixing chamber, it is obvious that compressed air may suffice tofaccoinplish 7 ;these results,

While under most conditions steam will prove to bethe most efficient agentfor atomizing the'oil and inducing it and the gases valve 12 and closing the oil valve, a mixture oat gas, steam' and air is obtained, and

by opening all of the valves a mixture of oil,

gas, steam and air maybe used. 7

I claim l. A burner comprising a mixing chamber, a gas port and an air port, the axes of said ports being in alinement and spaced from and extending at an angle to the "longitudinal axis of the chamber and the said ports having communicationwith the mixing chamber through a common discharge opening leading into the side of said chamber.

2. A burner comprising a mixing chamber, gas andair passageways having a common discharge opening'into said chamber, and oil and steam passageways terminating in said chamber to the rear of a line intersecting the longitudinal axis of the H11X- ing chamber and passing through the center of the gas and air discharge opening.

o. A burner of the fluid fuel type having a mixing chamber, a second chamber havinga partition dividing it into a plurality of compartments, one of said compartments having communication with an oil supply and the other having communication wit 1 a supply of heated fluid, and a jet for each of said compartments for conveying; their respective fluids to the mixing chamber, the

jet for the oil compartment being removably mounted and having a radial opening communicating with said oil compartment and extending through said plurality of comp artments.

4-. A burner of the fluid fuel type having a mixing chamber, a second chamber having a partition dividing it into a plurality of adjacent compartments, one of said compartments havingcommunication with an Oll supply and the other having, communicationwith a fluid. supplyunder pressure, each of said compartments having a etfor conveying their respective fluids to the mix- 1 ing chamber, and s-i'neans permitting the removal of the oil jet from the oil compart v men't said oil jet having a radial opening communicatingwith said oil compartment. 5 A burner of the fluid fuel type having a mixing chamber, a. second chamber having a partition. dividing-it into a plurality.

of adjacent compartments, one of said compartments having communication with an oil supply and the other having communi-.

cation with aifluid supply under pressure, and a jet for each compartment adapted to convey the fluid contained thereinto the mixing chamber, the oil jet extending with- 1n and'being arranged concentrically withv respect to the other jet and being provided with substantially radlal openings communicating with the oil compartment.

6. A burner of the fluid fuel type having- 7. A burner of the fluid fuel type having a mixing chamber, a second chamber having a partition dividing it into a plurality of adjacent compartments spaced longitudinally of the burner, one of said com partments having communication with an oil supply and the other having communication with a fluid supply under pressure, a jet for conveying the oil from its compartment and discharging it into the mixing chamber, said jet comprising a hollow memof said discharge opening extending at an angle to the axis 0t said chamber, and oil and steam passageways terminating inisaid chamber in line with said opening. 7

11. A burner comprising a mixing chamber having an air opening in a side wall thereof, and Oll and steam ets termlnatlng within said chamber, the said jets terminat- 7 ing at their delivery ends in line with sa1d 1 opening and being concentrically arranged one within the other and being coaxial with respect to the mixing chamber and the space between them adjacent their" delivery ends increasingin cross-sectional area in the direction of flow of the fluids.

'turer V CAMPBELL HUNTER.

ber' having radially disposed openings communicating with the oil compartment, and means for closing said jet rearwardly of said openings.

8. A burner of the fluid fuel type provided with a mixing chamber, coaxial gas and air passageways, an opening in a wall of the mixing chamber having communication with both of said passageways, and means for injecting fluid under pressure into said mixing chamber to the rear of the line passing through the center of the opening and. normal to'the longitudinal axis of the mixing chamber.

9. A burner of the fluid fuel type having a mixing chamber provided with an opening for the admission of air, a plurality of adjacent compartments, one of said compartments having communication with an oil supply and the other having communication with a fluid supply under pressure, and a jet for each of the compartments adapted to convey their respective fluids to the mixing chamber, the said jets being arranged in spaced relation one within the I other and having their delivery ends terminating substantially at said opening, the

space between the jets increasing in cross sectional area in the direction of flow of the fluids.

1.0. A burner having a mixing chamber andprovidedlwith a plurality of oppositely disposed ports, one of said ports being an air port and one of said ports beinga fuel port, a common dischargeopening connect ing said ports with said chamber, the axis In testimony whereof I affix my -signa- 

